Ore-concentrator



(No Model.)

J. TULLO G H. ORE GQNGBNTRATQR.

Patented Deo. 23, 1890.v

UNITED STATES PATENT Ormea JAMES TULLOOII, OF ANGELS CAMP, CALIFORNIA.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 443,17' 1, dated December 23, 1890. Application iiled July 1l, 1890. Serial No. 358,409. (No model.)

.T0 a/ZZ whom it may concern,.-

Be itknown that I, JAMES TULLOCH, a citizen of the United States, residing at Angels Camp, Calaveras county, State of California, have invented an Improvement in Ore-Concentrators; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to endless-belt concentrators; and it consists in the novel im-4 provements hereinafter fully described, and specifically pointed out in the claims.

These improvements all relate to and are formed in that special machine of this class patented by me October 8, 1889, No. 412,434, in which the belt-carrying frame is provided with rockers, upon which it has a laterallyoscillating movement, due to a crank-shaft and connecting-links, While the uphill travel of the belt is effected by means of a pawl and ratchet and intermediate power-transmitting mechanism from the ratchet to the drivingdrum of the belt. y

The object of my invention is to increase the general efficiency of this machine.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure l is .a perspective view of my concentrator. Fig. 2 is a detail of the belttightening device. Fig. 3 is an elevation of one of the rockers and tracks.

A is a bed-plate, having upon it near each end the fixed tracks a.

B is the rocking belt-carrying frame, having the rockers h, which operate on the tracks a. This frame, which is set at an inclination, carries at its head the driving-drum O and at its foot the lower drum c and between these the carrying-rollers c. Over these several drums and rollers passes the endless belt I). Rising from the bed A is a frame-work a', in which is journaled adrive-shaft E, having cranks e, and from which links e. extend to the rocking frame B, whereby said frame is rocked laterally.

The shaft of the driving-drum O has a gear F, with which meshes a pinion g on a counter-shaft G, which is carried by the rocking frame. Upon this counter-shaft is a ratchet g. In my former patent, above referred to, I operated this ratchetin order to transmit an uphill travel to the belt by means of a stationary pawl, which engaged the ratchet at each rocking movement of the frame B. In

the present instance I have changed this pawl as follows: Extending outwardly from the frame a is Van arm II, in which is pivoted by its lower end a vertical lever I, which is connected by a link t' with the top of the rocking frame B. Upon the lever I is mounted alug J, which is adapted to be adj usted up and down upon said lever and fixed in position by a set-screwj. In the end of this lug is pivoted the gravity-pawl K, the point of which engages the ratchet g.

The operation of this device is as follows: As the frame 'B rocks away from the pawl the ratchet accompanying the frame is turned by the pawl, so that motion is' transmitted to the driving-drum; but in this movement and by reason of the link connection 1? with the rocking frame thelever I is swung forwardly, which feeds the pawl forwardly suiiciently to throw it into position to engage the next tooth of the ratchet, when it returns with the return movement of frame B, and said pawl through this return movement and itsl connections with said frame takes up its initial position but in engagement with a fresh tooth of the ratchet. The engagement of pawl and ratchet is thus insured and rendered accurate and effective.

Rising from the bed A are supporting-arms Z, which carry the water-tank Il, in which the head of the belt as it passes the upper ydrum is washed, as usual. Secured to theV frame- .work a above the belt is the water-box M,

extending across it completely and having perforations m in its bottom. Secured by arms rising from the rocking frameB is the pulp hopper or receptacle N, the bottom of which is sloping and is provided with a series of holes n.

Clear water is supplied to the box M, and passing down through the holes in its bottom is finely distributed and sprinkled over the surface oi' the belt. The ore pulp and water are fed to the receptacle N, and instead of flowing over its lower edge, as is usual, passes down through the holes n in its bottom in numerous streams, whereby it is finely and equally distributed over the surface of the IOO belt. These means of supplying the pulp to the belt are advantageous, in that said pulp and water passing down through the holes in the bottom of the receptacle, which lies very close over the surface of the belt, there are numerous streams of it descending vertically and which act with force and such agitating effect upon the previous material on the belt that it is kept wellstirred and preven ted from packing. This enables meto rock the belt at a much slower speed than is ordinarily required for the side shake of machines of this class.

The lower roller c of the rocking frame B is mounted in arms O, which are adapted to slide in guides o on the side pieces of the rocking frame. These arms O are bent downwardly at their outer ends, where they form the bearings for the rollergudgeons. Between thesebent ends and the ends of the side pieces of the rocking frame are screws P, which are fitted in the ends of the side pieces and have their outer ends or heads bearing against the bent ends of the slides O. Now by turning these screws so as to set them out, their heads bearing against the slides O serve to force and hold said slides outwardly, therebytightening the belt, thus providing a simple and effective means for keeping the belt properly tightened.

In my former patent the rockers which were used were simply wooden pieces having at surfaces. These soon wore out on account of the sand and I have found it necessary to use rockers of metal, and in order to protect their operating-surfaces from the sand I make the tracks a, which are also of metal, with beveled tops and I make the rockers with correspondingly beveled grooved faces which fit upon the beveled tops of the tracks. This construction prevents the sand from getting upon the surfaces of the rockers and tracks, which are thus always kept clean. Upon the outer sides of the tracks are fitted the separated guide-plates Q, by means of elongated slots q and pins q', so that the space between said plates may be properly regulated. Secured to the rockers by means of elongated slots, and pins are the guide-arms R, which can thus be adjusted vertically. The lower ends of these guide arms are adapted to fit between the guide-plates, and thereby hold the rockers to their positions on the tracks. As these parts wear, they may be adjusted to take up the lost motion.

Having thus described my invention, what I claim as new, and desire to secure byLetters Patent, is

l. In an ore-conccntrator, the rocking beltcarrying frame having the driving-drum at its head, in combination with the means for effecting the uphill travel of the belt, consisting of the counter-shaft carried by the frame, gearing between said shaft and the drivingdrum, the ratchet on the counter-shaft, the gravity-pawl engaging the ratchet, the swinging lever carrying said pawl, and the link connecting the other end of the lever with the rocking frame, substantially as herein described.

2. In an ore-concentrator, the rocking beltcarrying frame having the driving-drum at its head, in combination with the countershaft carried by the rocking frame, gearing between the counter-shaft and the drivingdrum, the ratchet on the counter-shaft, the swinging lever, the vertically-adjustable lug on said lever, the link connecting the upper end of the lever with the rocking frame, and the gravity-pawl pivoted to the lug and engaging the ratchet, substantially as herein described.

3. In an ore-concentrator, and in combina,-` tion with the laterally-rocking endless traveling belt thereof, the pulp-receptacle mounted over the belt and having the series of perforations in its bottom, and a mechanism connected with the rocking mechanism for the belt for imparting an intermittent movement longitudinally to said belt, substantially as herein described.

et. In an ore-concentrator, the fixed tracks,

the belt-carrying frame having the rockers mounted on said tracks, the adjustable guideplates on the sides of the tracks, and the vvertically-.adjustable guide-arms on the rockers, substantially as herein described.

5. In an ore-concentrator, the combination of the rocking belt-.carrying frame having the rockers with grooved under surfaces, the fixed tracks with beveled upper surfaces litting the grooves of the rockers, the adjustable plates on the fixed tracks, and the vertically-adjustable guide arms of the rockers fitting between said plates, substantially as herein described.

In witness whereof I have hereunto set my4 hand.

JAMES TULLOCl-I. Witnesses:

HENRY PEAGHEY, GEO. STICKLE.

IOO 

